Short answer: the Marshall Kilburn II. It ranks #39 of 82 large speakers by sound quality, rated 3.8/5, at $279. The Treblab HD-Max ranks #73, rated 2.4/5, at $129.97, $149.03 cheaper, a saving that is not big enough to make up the sound-quality gap.
The case for the Marshall Kilburn II: 20W Class D amp + dual 8W tweeters. The tradeoff: Boosted upper bass, not very detailed, not as deep bass as competitors, upper mids peak.
What the Treblab HD-Max does well: 50W incredibly loud for size with four monstrous drivers, tested 22.4-hour battery (25+ hours at 50% volume). The catch: Boosted upper bass, not much lower bass.
Buy the Marshall Kilburn II. It is rated higher for sound quality, and saving $149.03 with the Treblab HD-Max does not make up for the sound-quality gap.
If water resistance matters to you, the Treblab HD-Max at IPX6 (powerful water jets) holds up far better than the Marshall Kilburn II at IPX2 (light drips).
Looking for alternatives? See the complete Portable Bluetooth rankings.
Specifications Side By Side
| Marshall Kilburn II | Treblab HD-Max | |
|---|---|---|
| Price | $279.00 | $129.97 |
| Ranked | #39 of 82 in Large Size Portable Bluetooth Speakers | #73 of 82 in Large Size Portable Bluetooth Speakers |
| Aux Input | Yes | Yes |
| Bass Extension (-10dB) | ~58Hz | ~60Hz |
| Battery Life | 20 hours (Manufacturer specified) | 20 hours (Manufacturer specified) |
| IP Rating | IPX2 | IPX6 |
| Weight | 5.5 lbs (2.49 kg) | 5.1 lbs (2.3 kg) |
| App | No | No |
| Bluetooth Codecs | SBC | SBC |
| Built-in Microphone | Yes | Yes |
| EQ | No | No |
| Party Mode | No | No |
| Power Bank | No | Yes (USB-A, 5V) |
| Power Input | USB-C | USB-C |
| Stereo | Yes | Yes |
| Omnidirectional | No | No |
| TWS | Yes | Yes |
| Amplifier Power | 36W | 60W |
| Dimensions | 9.6” x 6.4” x 5.5” (243 x 162 x 140 mm) | 12.2” x 5.3” x 5.6” (310 x 135 x 143 mm) |
| Drivers | 1x 4” (102mm) woofer + 2x 20mm dome tweeters | 2x 75mm woofers, 2x 30mm tweeters |
| Maximum SPL | 102dB (Manufacturer specified) | - |
| Digital Aux Input | No | No |
| Bluetooth Version | 5.0 | 5.3 |
| Frequency Response | - | 30Hz - 16kHz (Manufacturer specified) |
Related Speaker Comparisons
More top alternatives to Marshall Kilburn II:
- Marshall Kilburn II vs Vifa Helsinki
- JBL Xtreme 5 vs Marshall Kilburn II
- Tribit Stormbox Lava vs Marshall Kilburn II
- Marshall Kilburn II vs Brane X
- Marshall Kilburn II vs Minirig 4 with subwoofer
Prices on this page were last checked September 26, 2026 at 11:14 PM UTC. Product prices and availability are accurate as of that date/time and are subject to change; the price and availability shown on Amazon at the time of purchase will apply to the purchase of this product.
As an eBay Partner, we may be compensated if you make a purchase.
The Two Speakers In Full
Marshall Kilburn II: $279.00 Amazon eBay
Pros: 20W Class D amp + dual 8W tweeters. 20+ hour battery with quick-charge (20 min charges 3 hours of play). Rugged design with leather handle and reinforced corners, IPX2 rated. Thrives with rock music. Bluetooth 5.0 with 30ft range. Measured bass extension of ~58Hz (-10dB).
Cons: Boosted upper bass, not very detailed, not as deep bass as competitors, upper mids peak. Very low IPX2 water rating. AC charging
Full Marshall Kilburn II review and specifications →
| Amplifier Power | 36W |
|---|---|
| App | No |
| Aux Input | Yes |
| Bass Extension (-10dB) | ~58Hz |
| Battery Life | 20 hours (Manufacturer specified) |
| Bluetooth Codecs | SBC |
| Bluetooth Version | 5.0 |
| Built-in Microphone | Yes |
| Digital Aux Input | No |
| Dimensions | 9.6” x 6.4” x 5.5” (243 x 162 x 140 mm) |
| Drivers | 1x 4” (102mm) woofer + 2x 20mm dome tweeters |
| EQ | No |
| IP Rating | IPX2 |
| Maximum SPL | 102dB (Manufacturer specified) |
| Omnidirectional | No |
| Party Mode | No |
| Power Bank | No |
| Power Input | USB-C |
| Stereo | Yes |
| TWS | Yes |
| Weight | 5.5 lbs (2.49 kg) |
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
- Marshall Kilburn II vs Xdobo Bucket /BMTL Bucket / Zicoroop Ts
- Marshall Kilburn II vs JBL Xtreme 4
- Marshall Kilburn II vs W-King T9
- Marshall Kilburn II vs Ultimate Ears Everboom
- Marshall Kilburn II vs Devialet Mania
- Marshall Kilburn II vs Sony ULT Field 5
- Marshall Kilburn II vs Marshall Middleton
- Marshall Kilburn II vs Sony SRS-XB43
- See all 59 comparisons
Treblab HD-Max: $129.97 Amazon eBay
Pros: 50W incredibly loud for size with four monstrous drivers, tested 22.4-hour battery (25+ hours at 50% volume). IPX6 water-resistant for elements exposure. Power bank feature with 10W USB-A output for device charging. Three sound modes with unique EQ properties. Excellent construction, well-made components. Measured bass extension of ~60Hz (-10dB).
Cons: Boosted upper bass, not much lower bass. Only IPX6 water rating
Full Treblab HD-Max review and specifications →
| Amplifier Power | 60W |
|---|---|
| App | No |
| Aux Input | Yes |
| Bass Extension (-10dB) | ~60Hz |
| Battery Life | 20 hours (Manufacturer specified) |
| Bluetooth Codecs | SBC |
| Bluetooth Version | 5.3 |
| Built-in Microphone | Yes |
| Digital Aux Input | No |
| Dimensions | 12.2” x 5.3” x 5.6” (310 x 135 x 143 mm) |
| Drivers | 2x 75mm woofers, 2x 30mm tweeters |
| EQ | No |
| Frequency Response | 30Hz - 16kHz (Manufacturer specified) |
| IP Rating | IPX6 |
| Omnidirectional | No |
| Party Mode | No |
| Power Bank | Yes (USB-A, 5V) |
| Power Input | USB-C |
| Stereo | Yes |
| TWS | Yes |
| Weight | 5.1 lbs (2.3 kg) |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons